embeded/Cortex-M7 STM2021. 7. 2. 19:37

stm32f4 otg update bin file

 

AN3990

[링크 : https://www.st.com/resource/en/application_note/dm00039672-upgrading-stm32f4discovery-board-firmware-using-a-usb-key-stmicroelectronics.pdf]

 

um1021

[링크 : https://www.st.com/resource/en/user_manual/cd00289278-stm32f105xx-stm32f107xx-stm32f2xx-and-stm32f4xx-usb-onthego-host-and-device-library-stmicroelectronics.pdf]

 

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embeded/Cortex-M7 STM2021. 7. 2. 19:34

stm32cubeide generate bin

cubeide로 빌드하는데 hex와 elf는 나오는데 bin은 안나와서 검색!

겁나~ 구성탱이에 있네 -_-

Convert to binary file (-O binary)를 체크해주면 된다. 기본값은 꺼져 있는 듯?

 

[링크 : https://blog.naver.com/chandong83/221751192307]

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embeded/Cortex-M7 STM2021. 7. 2. 16:47

stm32cubeide gdb external flash

 

1.1 GDB server start-up options
--ext-memory-loaders
Provides the list of the available external memory loaders.

-el <file_path>, --extload <file_path>
Selects a custom external memory-loader.

--external-init
Runs Init() from external memory loader after reset to make external memory accessible without need for
application software to set up the access to memory-mapped external memory.
[This option requires that option -el <file_path>, --extload <file_path> is used also.]


2.3.1 Loading program to external memory
When a program must be loaded to an external memory, the option --extload <file_path> must be used.
External memory loader files are delivered for most available STM32 Evaluation and Discovery boards containing
external memory. To list the available loader files, use the --ext-memory-loaders option.
The STM32CubeProgrammer software description user manual (UM2237) contains detailed information on how
to use external Flash loader programs and develop customized loaders for external memory. The user manual is
available from the STM32CubeProg webpage on www.st.com.

2.3.2 Memory read/write to external memory
To make external memory accessible for read and write by the debugger, use the --external-init option
together with external memory loader --extload <file_path> option. When --external-init is used the
Init() function in the external memory loader is run by the ST-LINK GDB server after reset. This makes
external memory accessible without any need for application software to set up the device for external memory
access. The external memory must be memory mapped and directly accessed because normal memory read/
write is used by gdb.
Note: When using the --external-init option with the ST-LINK GDB server, the stack required by the Init()
function is limited to 1024 bytes of stack instead of 400 bytes in ST-LINK GDB server v5.4.0.

[링크 : https://www.st.com/resource/en/user_manual/dm00613038-stm32cubeide-stlink-gdb-server-stmicroelectronics.pdf]

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embeded/Cortex-M7 STM2021. 7. 2. 16:31

TouchGFX on STM32F746G-DISCO

STM32F746NGHx_FLASH.ld

/* Specify the memory areas */
MEMORY
{
FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 1024K
RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 320K
ITCMRAM (xrw)      : ORIGIN = 0x00000000, LENGTH = 16K
QSPI (rx)         : ORIGIN = 0x90000000, LENGTH = 16M
}

  .ARM.attributes 0 : { *(.ARM.attributes) }
  ExtFlashSection : { *(ExtFlashSection) } >QSPI
}

 

#include <touchgfx/hal/Config.hpp>

LOCATION_EXTFLASH_PRAGMA
KEEP extern const unsigned char _control_center_button_pressed[] LOCATION_EXTFLASH_ATTRIBUTE = { // 191x191 RGB565 pixels.
// ...
};

 

#elif defined(__ARMCC_VERSION)
#define LOCATION_EXTFLASH_PRAGMA
#define LOCATION_EXTFLASH_ATTRIBUTE __attribute__ ((section ("ExtFlashSection"))) __attribute__ ((aligned(4)))

#elif defined __ICCARM__
#define LOCATION_EXTFLASH_PRAGMA _Pragma("location=\"ExtFlashSection\"")

 

내장 플래시

 

외부 QSPI 플래시

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embeded/Cortex-M7 STM2021. 7. 2. 15:23

st-link stm32 option bytes

 

 

 

RDP가 이곳에!?

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embeded/Cortex-M7 STM2021. 7. 2. 15:22

st-link util external module?

 

 

 

 

 

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embeded/Cortex-M3 STM2021. 7. 2. 11:07

STM32 RDP(ReaD Protection)

AVR의 fuse bit 같은 녀석

 

Level 0: no read protection
Level 1: read protection enabled
Level 2: debug/chip read protection disabled

[링크 : https://www.st.com/resource/en/reference_manual/DM00031020-.pdf]

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embeded/Cortex-M7 STM2021. 7. 2. 11:04

cortex-M7 우와.. -_-

DMIPS 값이 아주 넘사벽이네.. ㄷㄷ

L1 캐시의 유무도 클꺼고..

 

Characteristics
Performance Efficiency: 5.01 CoreMark/MHz* and 2.14/3.23 DMIPS/MHz**

[링크 : https://developer.arm.com/ip-products/processors/cortex-m/cortex-m7]

[링크 : https://yomi-tory.tistory.com/entry/그것을-알아보자-ARM-Cortex-M7]

 

Characteristics
Performance Efficiency: 3.42 CoreMark/MHz* and without FPU: 1.25 /1.52 /1.91 DMIPS/MHz**, with FPU: 1.27 /1.55 /1.95 DMIPS/MHz**

[링크 : https://developer.arm.com/ip-products/processors/cortex-m/cortex-m4]

[링크 : https://yomi-tory.tistory.com/entry/그것을-알아보자-ARM-Cortex-M4]

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embeded/Cortex-M7 STM2021. 7. 2. 10:50

new 장난감! STM32F746G-DISCO

와.. cortex-m7 이라는건 첨 들어보네

STM32F746NGH6 in TFBGA216 package
ARM®32-bit Cortex®-M7 + FPU + Chrom-ART Accelerator
216 MHz max CPU frequency
VDD from 1.7 V to 3.6 V
1024 KB Flash
320 KB SRAM
GPIOs (168) with external interrupt capability
12-bit ADCs with 24 channels (3)
12-bit DAC channels (2)
USART/UART (8)
I2C (4)
SPI (6)
Advanced-control Timer (2)
Low-power Timer (1)
General Purpose Timers (12)
Watchdog Timers (2)
CAN 2.0B active (2)
SAI (2)
USB 2.0 OTG HS
USB 2.0 OTG FS
Ethernet
SDMMC
Camera interface
Random Generator (TRNG for HW entropy)
LCD-TFT

[링크 : https://os.mbed.com/platforms/ST-Discovery-F746NG/]

[링크 : https://www.st.com/en/evaluation-tools/32f746gdiscovery.html]

[링크 : https://blog.naver.com/chandong83/220783693412] 2016년 글이니 나온지 꽤 된 녀석이구나..

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embeded/raspberry pi2021. 7. 1. 17:34

rpi pico USB 키보드 코드 수정

GND에 빨간선이 연결되어있고

스위치의 반대편은 GPIO로 연결되어 있는데

GPIO에 pull up이 있어서 인지 스위치를 누르면 ground로 인식이 된다.

(아래 코드에서 4번째 라인 not을 지웠다가 파일 바꾼다고 dog 고생을...)

while True:
    # Check each pin
    for key_pin in key_pin_array:
        if not key_pin.value:  # Is it grounded?
            i = key_pin_array.index(key_pin)
            print("Pin #{} is grounded.".format(i))

            # Turn on the red LED
            led.value = True

            while not key_pin.value:
                pass  # Wait for it to be ungrounded!
            # "Type" the Keycode or string
            key = keys_pressed[i]  # Get the corresponding Keycode or string
            if isinstance(key, str):  # If it's a string...
                keyboard_layout.write(key)  # ...Print the string
            else:  # If it's not a string...
                keyboard.press(control_key, key)  # "Press"...
                keyboard.release_all()  # ..."Release"!

            # Turn off the red LED
            led.value = False

    time.sleep(0.01)

 

아무튼.. 원래 의도는 3V 전원에서 330옴 통해서 전류 제한해서 gpio로 3.3V가 들어가게 하는거였는데

멀 잘못했네.. 멀티메터로는 정상적으로 3.3V 나오던데 ㅠㅠ

 

[링크 : https://tutorial.cytron.io/.../keyboard-emulator-using-raspberry-pi-pico-maker-pi-pico-and-circuitpython/]

[링크 : https://circuitpython.readthedocs.io/projects/hid/en/latest/api.html]

 

 

+

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